<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>login</title>
    <link href="//unpkg.com/layui@2.9.21-rc/dist/css/layui.css" rel="stylesheet">
</head>
<body>
    <form class="layui-form" action="/login/" method="post">
      <div class="demo-login-container">
        <div class="layui-form-item">
          <div class="layui-input-wrap">
            <div class="layui-input-prefix">
              <i class="layui-icon layui-icon-username"></i>
            </div>
            <input type="text" name="username" value="" lay-verify="required" placeholder="用户名" lay-reqtext="请填写用户名" class="layui-input" lay-affix="clear">
          </div>
        </div>
        <div class="layui-form-item">
          <div class="layui-input-wrap">
            <div class="layui-input-prefix">
              <i class="layui-icon layui-icon-password"></i>
            </div>
            <input type="password" name="passwd" value="" lay-verify="required" placeholder="密   码" lay-reqtext="请填写密码" class="layui-input" lay-affix="eye">
          </div>
        </div>
        <div class="layui-form-item">
          <div class="layui-row">
            <div class="layui-col-xs7">
              <div class="layui-input-wrap">
                <div class="layui-input-prefix">
                  <i class="layui-icon layui-icon-vercode"></i>
                </div>
                <input type="text" name="captcha" value="" lay-verify="required" placeholder="验证码" lay-reqtext="请填写验证码" autocomplete="off" class="layui-input" lay-affix="clear">
              </div>
            </div>
            <div class="layui-col-xs5">
              <div style="margin-left: 10px;">
                <img src="https://www.oschina.net/action/user/captcha" onclick="this.src='https://www.oschina.net/action/user/captcha?t='+ new Date().getTime();">
              </div>
            </div>
          </div>
        </div>
        <div class="layui-form-item">
          <button class="layui-btn layui-btn-fluid" type="submit">登录</button>
        </div>
      </div>
    </form>
</body>
</html>
<script src="//unpkg.com/layui@2.9.21-rc/dist/layui.js"></script>
<style>
    .layui-form{
        display: flex;
        justify-content: center;
        align-items: center;
        height: 100vh;
        margin: 0;
    }
    .demo-login-container{
        width: 320px; 
        margin: 21px auto 0;
        
        
    }
    .demo-login-other .layui-icon{position: relative; display: inline-block; margin: 0 2px; top: 2px; font-size: 26px;}
</style>